#00A447 · #FF0000
Four independent scores (read the one that fits your goal): Readability 4/100 (fail) · Harmony 100/100 (split-complementary) · Distinguishable 100/100 (easy to tell apart) · Match 0/100 (different). There is no single “good/bad” — a pair can clash for text yet be great for an outfit.
Jade and Red are very different (ΔE 140). They have distinctly different hues (146° apart) and their lightness is similar, so they read as two same-weight colours.
Jade text on Red: 1.22:1 (Fail); Red text on Jade: 1.22:1 (Fail). Neither meets AA at body size — nudging one color to #001B04 clears it.
Split-complementary — split-complementary — a recognised, balanced pairing (harmony 100/100). This is about how they look together (clothing, interiors, branding), independent of text contrast.
Not at body size — the best direction is only 1.2:1, below the 4.5:1 minimum. Nudging one colour to #001B04 clears AA.
Their CIE76 ΔE is about 140 — very different.
clearly different colours (ΔE 140).
Explore each color: Jade #00A447 · Red #FF0000 · Shades: Jade shades · Red shades · Contrast checker →